Oil & Gas
| Thu 16 Apr 2026
Beijing, April 16 -- PetroChina has submitted a patent application for Precise Dismounting and Mounting Tool for Air Valve of Reciprocating Compressor. Gao Wenjiang, Chen Yongxin, Si Ke, Chen Mingzhong, Yang Liu, Gong Zhaojun, Ma Deyou, Tian Junjun, Ye Hai, Liu Yong, Sui Jian, Li Guolong, Li Yujie, Ji Hongjun, Qin Yuechao, Xu Le..